You write this as if there isn't controversy about mustard oil, which is banned in the United States because it contains high levels of a likely heart toxin ("Among South Asians living in the US, ASCVD risk is four-fold higher than the local population") and limited throughout Europe. The entire point of solvent extraction is convert rapeseed oil, which would otherwise be similarly problematic (they're basically the same plant!) into something less toxic than mustard oil (that's literally why it's called "canola").

I don't care either way; let the mustard oil flow. I don't buy the mustard oil thing either. Just don't pretend that mustard oil is somehow healthier than canola. Use whichever fat tastes best to you.